Sheet-metal structural element.



1 mi. 665,7 Patented 1an. |,A |901.

vP. KUHNE. SHEET- METL STRUCTURAL ELEMENT.

(Application led Sept. 20. 1900.)

(no Modem',

f /N VEN 7'0/'7 Wl TNE SSE S Afro l Ys' UNITED STATES PATENT OFFICE.

PAUL KHNE, or NEW YORK, N. Y.

lSHEETNIETAL STRUCTURAL ELEMENT.

SPECIFICATION forming part of Letters Patent No. 665,117, dated January 1, 1901.

Application tiled September 20, 1900. Serial No. 30,540. (No model.)

To all whom, it may concern.-

Be it known that I, PAUL KHNE, a citi zen of the United States, residing in New York, borough of Manhattan, State of New York, have invented certain new and useful Improvements in Sheet-Metal Structural Elements for Buildings, of which the following is a specification.

This invention relates to sheet-metal structural elements for building purposes, and is used in walls, floors, partitions, dac., the same being constructed with open meshes to hold the concrete or plaster or other body material and so that it is practically the same on one side as on the other, it being opened out to form a double structural element, as it were, thus presenting the same strength and advantages on one side as on the other and permitting the workmen to place the same in position without havin g to take care as to which is the right or the wrong side.

My invention consists of a sheet-metal structural element for building or other purposes,

'the same comprising a sheet-metal plate constructed with two suitable faces composed of substantially parallel strips and a plurality of truss portions connecting pairs of strips ot' opposite faces together, as will be herein-A after fully described and then claimed.

In the accompanying drawings, Figure l is a perspective view of a sheet-metal structural element embodying my invention. a plan View ot a piece of sheet metal, showing the slits or slashes formed therein previously to opening out the metal; and Fig. 3 is a transverse section of a door construction, showing my sheet-metal structural element embedded in the concrete foundation thereof.

Similar letters of reference indicate corresponding parts.

Referring to' the drawings, A indicates a piece of sheet metal which, as shown in Fig. 2, is formed with parallel slits or slashes a ct', of which slits a terminate equally with 'each other, while slits ct are relatively odset to the slits or slashes ot. A flat plate provided with these slits or slashes is passed through a suitably-conformed pair of rolls, so as toy form, as shown clearly in Fig. l, a laterally widened or expanded sheet-metal structural element A, which is provided with transverse diamond-shaped meshes b, that determine the Fig. 2 is4 width or thickness of the structural element and that extend in diagonal parallel rows across the body A. The meshes b, before referred to, are so made as that at opposite sides ot the piece of sheet metal A diagonally-arranged and approximately parallel zigzag' ribs or strips d d3 are formed, the strips CZ lying in one plane at one side of the body A and the ribs or strips d' lying in another plane at the other side of the same. These zigzag strips d d' each consist ot' short parallel offset portions d2 d3,

respectively, those at one side of the body A being connected to those at the other side of the same by means of transverse inclined connecting portions d4, so that each mesh is deiined or formed by means of its appropriate strip portions d2 d3 and connecting portions The meshes open in a plane coincident with the plane of the structure, so that the structural element or body A is held in opened-out position by means'of the short inclined connecting portions d4, which take up the weight, and the diagonal zigzag ribs or strips d, which take up the stress or tension strains which pass across the plane of the body A.

As designated more clearly in Fig. 3, the alternating inclined connecting portions d4 cross each other when the body A is viewed in side elevation, so that, theoretically, it will be seen that any two of the so-crossed diagonal connecting portions form a truss, and

thereby the two faces of the structural eletural element takes up all the tensional strain,

while the concrete takes up the strains of compression, as usual.

The similarity of both sides of the structural element enables both sides to be plastered over similarly, and bothsides will hold equally well.

IOO

Having thus described my invention, I claim as new and desire to secure by Letters Patent- 1. The herein-described structural element for partitions, Walls, floors, dac., of buildings, the same consisting of a sheet-metal plate, constructed with diagonally-arran ged meshes opened out transversely to the plane of the saine and defining the thickness of the iinished plate, and said finished plate being provided at both sides with diagonally-extending zigzag-shaped strips, those at one side lying in one plane and those at the other side lying in another plane, substantially as set forth.

2. The herein-described structural element for partitions, Walls, floors, duc., of buildings,

.the saine consisting of a sheet-metal plate provided with meshes defining the thickness of the finished plate, said finished plate havingtwo similar faces composed of diagonal strips, substantially as set forth.

3. The he1'eindescribed structural element for partitions, Walls, floors, dac., the same cousisting of a sheet-metal plate, constructed With diagonal zigzag strips, in the plane of and on the opposite faces of the finished plate and arranged approximately parallel, substantially as set forth.

4. The herein-described structural element for partitions, Walls, floors, 65e., the same consisting of a sheetmetal plate, constructed with two suitable faces composed of substantiall y parallel strips, and a plurality of spaced truss portions connecting pairs of strips of opposite faces together, substantially as set forth.

In testimony that I claim the foregoing as rny invention I have signed my name in presence of two subscribing Witnesses.l

PAUL Kl-INE.

Vitnesses:

GEORGE C. GEIBEL, GEO. L. WHEELOCK. 

